I'm in the middle of renovating an IG pool/ spill over spa combination. My question is how do most people have the water recirculating. My thought was you open the suction on the pool valves. Close the returns on the pool. Return the water to the spa so that it spills over. If that is correct wouldn't the water in the spa have a much higher chlorine content than the pool? This pool will be using a SWG to chlorinate.